Test just to prove that projected documents dont' accidentally get op…

…timistic concurrency from the policy. Closes GH-2978

src/EventSourcingTests/Bugs/Bug_2978_aggregate_projection_documents_are_not_optimistic_concurrency_event_with_that_policy.cs

@@ -0,0 +1,29 @@
+using EventSourcingTests.Aggregation;
+using Marten;
+using Marten.Events.Projections;
+using Marten.Testing.Documents;
+using Marten.Testing.Harness;
+using Shouldly;
+using Xunit;
+
+namespace EventSourcingTests.Bugs;
+
+public class Bug_2978_aggregate_projection_documents_are_not_optimistic_concurrency_event_with_that_policy : BugIntegrationContext
+{
+    [Fact]
+    public void override_the_optimistic_concurrency_on_projected_document()
+    {
+        StoreOptions(opts =>
+        {
+            opts.Policies.AllDocumentsEnforceOptimisticConcurrency();
+            opts.Projections.Add<AllGood>(ProjectionLifecycle.Async);
+        });
+
+        var mapping = theStore.Options.Storage.MappingFor(typeof(MyAggregate));
+        mapping.UseNumericRevisions.ShouldBeTrue();
+        mapping.UseOptimisticConcurrency.ShouldBeFalse();
+
+        theStore.Options.Storage.MappingFor(typeof(Target))
+            .UseOptimisticConcurrency.ShouldBeTrue();
+    }
+}

src/Marten/Events/Projections/AsyncProjectionVersionPolicy.cs → src/Marten/Events/Projections/ProjectionDocumentPolicy.cs

@@ -3,9 +3,9 @@
 namespace Marten.Events.Projections;
 
 /// <summary>
-/// Just adds a suffix to the document alias of a projected aggregate
+/// Makes several modifications to the documents of projections
 /// </summary>
-internal class AsyncProjectionVersionPolicy : IDocumentPolicy
+internal class ProjectionDocumentPolicy : IDocumentPolicy
 {
     public void Apply(DocumentMapping mapping)
     {

src/Marten/StoreOptions.cs

@@ -58,7 +58,7 @@ internal INpgsqlDataSourceFactory NpgsqlDataSourceFactory
 
     private readonly IList<IDocumentPolicy> _policies = new List<IDocumentPolicy>
     {
-        new VersionedPolicy(), new SoftDeletedPolicy(), new TrackedPolicy(), new TenancyPolicy(), new AsyncProjectionVersionPolicy()
+        new VersionedPolicy(), new SoftDeletedPolicy(), new TrackedPolicy(), new TenancyPolicy(), new ProjectionDocumentPolicy()
     };
 
     /// <summary>